Question: 3. Ten mutants of the rII region in bacteriophage T4 DNA were
analyzed for complementation. These…
3. Ten mutants of the rII region in bacteriophage T4 DNA were
analyzed for complementation. These mutations are known to fall
into TWO cistrons. The results are given in the table below where
+= complementation and __ = no complementation.
|
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
|
|
1 |
__ |
__ |
+ |
+ |
__ |
+ |
__ |
__ |
+ |
__ |
|
2 |
__ |
__ |
__ |
__ |
__ |
__ |
__ |
__ |
__ |
|
|
3 |
__ |
__ |
+ |
__ |
+ |
__ |
__ |
+ |
||
|
4 |
__ |
+ |
__ |
+ |
__ |
__ |
+ |
|||
|
5 |
__ |
+ |
__ |
__ |
+ |
__ |
||||
|
6 |
__ |
+ |
__ |
__ |
+ |
|||||
|
7 |
__ |
__ |
+ |
__ |
||||||
|
8 |
__ |
__ |
__ |
|||||||
|
9 |
__ |
+ |
||||||||
|
10 |
__ |
a Indicate which mutations fall into each of the two
cistrons.
b What type of mutation can explain the results for mutants 2
and 8?
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